diff --git a/vector/src/main/java/im/vector/app/core/usecase/VectorBaseInOutUseCase.kt b/vector/src/main/java/im/vector/app/core/usecase/VectorBaseInOutUseCase.kt
deleted file mode 100644
index 277da6794a..0000000000
--- a/vector/src/main/java/im/vector/app/core/usecase/VectorBaseInOutUseCase.kt
+++ /dev/null
@@ -1,21 +0,0 @@
-/*
- * Copyright (c) 2022 New Vector Ltd
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package im.vector.app.core.usecase
-
-interface VectorBaseInOutUseCase<T, R> {
-    suspend fun execute(input: T): Result<R>
-}
diff --git a/vector/src/main/java/im/vector/app/features/media/domain/usecase/DownloadMediaUseCase.kt b/vector/src/main/java/im/vector/app/features/media/domain/usecase/DownloadMediaUseCase.kt
index aca5661a8f..0f44b02143 100644
--- a/vector/src/main/java/im/vector/app/features/media/domain/usecase/DownloadMediaUseCase.kt
+++ b/vector/src/main/java/im/vector/app/features/media/domain/usecase/DownloadMediaUseCase.kt
@@ -20,7 +20,6 @@ import android.content.Context
 import androidx.core.net.toUri
 import dagger.hilt.android.qualifiers.ApplicationContext
 import im.vector.app.core.intent.getMimeTypeFromUri
-import im.vector.app.core.usecase.VectorBaseInOutUseCase
 import im.vector.app.core.utils.saveMedia
 import im.vector.app.features.notifications.NotificationUtils
 import kotlinx.coroutines.withContext
@@ -32,14 +31,10 @@ class DownloadMediaUseCase @Inject constructor(
         @ApplicationContext private val appContext: Context,
         private val coroutineDispatchers: MatrixCoroutineDispatchers,
         private val notificationUtils: NotificationUtils
-) : VectorBaseInOutUseCase<File, Unit> {
+) {
 
-    // TODO
-    //  what about UseCase Interface enforcing single type input? => no interface
-    //  add unit tests
-    //  PR to template structure of a class for discussion
-
-    override suspend fun execute(input: File): Result<Unit> = withContext(coroutineDispatchers.io) {
+    // TODO add unit tests: https://github.com/vector-im/element-android/tree/develop/vector/src/test/java/im/vector/app/test
+    suspend fun execute(input: File): Result<Unit> = withContext(coroutineDispatchers.io) {
         runCatching {
             saveMedia(
                     context = appContext,